Viconics VT8300 Low Voltage Application Guide - Manual (Page 23)

©
2
01
5 V
ic
onc
is
T
ec
hno
lo
gi
es
. A
ll r
ig
ht
s r
ese
rv
ed
.
23 Fan Coil Unit Controller Series Application Guide
Viconics Technologies Inc. | 9245 Langelier Blvd. | St.-Leonard | Quebec | Canada | H1P 3K9 | Tel: (514) 321-5660 | Fax: (514) 321-4150
028-0444-01 www.viconics.com | [email protected] February 2015
1 2 3 4 5 6
13 14 15 16 17 18
7 8 9 10 11 12
19 20 21 22 23 24
1 2 3 4 5 6
13 14 15 16 17 18
7 8 9 10 11 12
19 20 21 22 23 24
VT8300
BO2 - Fan L BO3 - Fan M BO4 - Fan H RC (24 V
ac)
C (Common)
RH
BO8 - Aux Heat
V
UO11
- Analog Heat
UO12
- Analog Cool
BACnet + BACnet - BACnet REF UI 16 UI 17 Common UI 19 UI 20 - RS Common UI22 - SS
Modulating Control
HEATING VALVE
0-10 v 24 v Com.
COOLING VALVE
0-10 v 24 v Com.
COMM ON
24 VAC
FAN HI
FAN MED
FAN LO
FCU Low-voltage
TERMINAL BLOCK
Sequence of Operation and Wiring
Occupied Mode
Setpoints revert to those defined by occupied cooling and heating.
The changeover sensor sends supply air temperature to controller.
Stand-by Mode (only available when PIR motion detector
sensor is used)
Setpoints revert to those defined by stand-by cooling and heating.
Unoccupied Mode
Setpoints revert to those defined by unoccupied heating and
cooling.
Occupied Override Mode
System reverts to occupied mode for duration determined by
“ToccTime” parameter.
On Call for Cool
Cooling valve opens to maintain room temperature. Heating valve
closes. Dehumidification enabled.
On Call for Heat
Heating valve opens to maintain room temperature. Cooling valve
closes. Dehumidification disabled.
On Demand for Dehumidification
Dehumidification is achieved via cooling coil using heating coil for
reheat if necessary.
Dehumidification only allowed in COOL mode, or if cooling is
enabled in AUTO mode.
Dehumidification disabled if room temperature falls below low
ambient lockout temperature, which is cooling setpoint minus
configuration defined deadband value.
Reheat disabled if cooling demand reaches 100%.
Options
• Wireless adapter modules for BACnet models are available.
(see Appendix B for network wiring).
• Remote wall mount or duct sensor ready.
• Can be configured for 2-pipe systems.
• 3 universal inputs can be used and configured for advanced
functionality as required by the application.
• Universal input can be configured for changeover sensor.